Brake



Nov. 17, 1936. M, w, McCONKEY 2,060,886

BRAKE Original Filed July 16, 1927 IN VEN TOR.

MONTGOMERY W. MCONKEY ATTORNEY Patented Nov. 17, 1936 UNITED STATES BRAKE Montgomery W. McConkey, South Bend, Ind., as-

signor, by mesne assignments, to Bendix Brake Company, South Bend, Ind., a corporation of Illinois Original application July 16, 1927, Serial No. 206,264. Patent No. 1,875,081, dated August 30, 1932. Divided and this application March 10,

1932, Serial No. 598,022

12 Claims. (Cl. 188-78) This invention relates to brakes and is illustrated as carried out in the manufacture of several different forms of internal expanding brakes for automobiles.

One phase of the invention has to do with the arrangement of a brake with one of the shoes anchored on a thrust link which is pivoted at one end to the shoe and which at its other end is mounted on a pivot between the ends of the adjacent shoe or the like. I prefer to arrange the pivot for the end of this thrust link as a connection to the web of said adjacent shoe. This arrangement is especially advantageous with a brake of the three-shoe type in which an an chored secondary shoe is operated by a floating primary shoe and the above-described link anchor is used for an auxiliary shoe arranged at the anchor end of the secondary shoe.

Still other features of novelty relate to certain structural details of the brake shoes and to other novel and desirable details of construction which will be apparent from the following description of the brakes shown in the accompanying drawing, in which:

Figure 1 is a side elevation of a T-section ring with the material to be removed indicated by dotted lines; and

Figure 2 is a vertical section through a brake made from the ring shown in Figure 1, the section being taken just inside the head of the brake drum and showing the shoes in side elevation.

In the arrangement shown in Figures 1 and 2, there is a ring 20 of material such as rolled steel, and which is T-shaped in cross-section to form an outer cylindrical face 22, to which the brake' lining 24 may be riveted or otherwise secured, and a central stifiening web 26. In cutting the ring into segments to form a plurality of shoes, the material indicated by dotted lines in Figure l is removed. The material 28 is removed to form a space for the brake-applying cam 30 and the material 32 is removed to provide a clearance 34 between the primary and secondary shoes of the brake, while the material 36 is removed to give the clearance 38 between the secondary and auxiliary shoes of the brake. This method of manufacture is claimed in my parent application No. 206,264, on which Patent No. 1,875,081 was granted August 30, 1932, and of which the present application is a division.

The brake made with the segments so formed is shown in Figure 2. This brake includes a secondary brake shoe 40 arranged within a rotatable brake drum 42 and anchored on a pivot 44 secured to a backing plate 46 at the open side of the brake drum. The secondary shoe 40 is urged away from the drum when the brake is released by a spring 48 connected directly to the shoe and a spring 50 connected to a pair of links 52 on opposite sides of the webs of the shoes and pivotally connecting the secondary shoe 40 to a primary shoe 54 engaged by the operating cam 30. The idle position of the secondary shoe 40 may be determined by a suitable adjustable stop 56. The auxiliary shoe 58, which is also operated by cam 30 against the resistance of a main return spring 60, is pivotally connected to one or a pair of thrust links 62 which are mounted at their lower ends on a pivot 64 arranged between the ends of the secondary shoe 40 and which I prefer shall connect the links 62 to the web 26 of the shoe 40. The return springs 48 and 60 are shown connected to the link 62 and urging the shoe 58 away from the brake drum.

The primary and auxiliary shoes are shown with hardened cam engaging thrust plates H4 which may be welded or otherwise secured to the ends of the shoes.

While illustrative constructions have been described in detail, it is not my intention to limit the scope of the invention to those particular constructions or otherwise than bythe terms of the appended claims.

I claim:

1. A brake comprising a shoe anchored at one end, a second shoe arranged beyond the anchored end of the anchored shoe, and a link connecting the center of the second shoe to the anchored shoe a short distance from its anchored end.

2. A brake comprising a shoe anchored at one end, a second shoe arranged beyond the anchored end of the anchored shoe, and a link connecting the second shoe to the anchored shoe, said link lying on a line radially inside the point at which the shoe is anchored.

3. A brake comprising a pair of shoes arrangedend to end with a space between their ends, and a link bridging said space and connecting the center of one of the shoes to the other shoe adjacent its end.

4. A brake comprising a pair of shoes arranged tensioned respectively between the link and the other one of the end shoes and the anchored shoe.

7. A brake comprising a friction device pivotally mounted on an anchor post adjacent the periphery of the brake at one end and having applying means acting on its other end, a shoe acted on by said means at one end and having its other end adjacent said post and a rigid thrust connection from said shoe extending past and radially inside said post and connected to the friction device on the other side of the post from said shoe.

8. A brake comprising a friction device engaging a fixed anchor at one end and having applying means acting on its other end, a shoe acted on by said means at one end and having its other end adjacent said anchor and a rigid thrust link pivoted at one end to said shoe and extending past said anchor and pivoted at its other end to the friction device on the other side of the anchor from said shoe the line of thrust of said link lying radially inside said anchor.

9. A brake comprising friction means including rigid shoes, one of which is provided with a fixed anchor at one end, and the other of which is connected to the anchor shoe by a link extending past and radially inside said anchor and pivoted to said shoes at its ends.

10. A brake comprising friction means including rigid shoes, one of which is provided with a fixed anchor at one end, and the other of which has a link extending past and radially inside said anchor and pivoted to'said anchored shoe adjacent said anchor.

11. A brake comprising friction means including rigid shoes, one ofwhich is provided with a fixed anchor at one end, and the other of which has thrust-transmitting means extending past and whose line of thrust is radially inside said anchor and connected to said anchored shoe adjacent said anchor.

12. A brake comprising a friction device engaging a fixed anchor at one end and having applying means acting on its other end, said device comprising two pivotally-connected rigid sections, one engaging the anchor and the other engaged by the applying means, a shoe acted on by said means at one end and having its other end adjacent said anchor and a rigid thrust link pivoted at one end to said shoe and extending past said anchor pivoted at its other end to the friction device on the other side of the anchor from said shoe.

MONTGOMERY W. McCONKEY. 

